DESCO WEST
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178
DESCO EAST
- One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Website:
Desco.com
TB-3034
Page 5 of 6
© 2013 DESCO INDUSTRIES, INC.
Employee Owned
If your finger is removed too early, the tester’s LEDs will
blink three times to indicate that the test was not
completed. DO NOT touch any other metal while
performing your test as this will affect your results.
NOTE: Often the initial intermittency will be failure of strain
relief connection to resistor as simulated by ESD S1.1-1998
paragraph 5.7 Bending Life Test.
4. A “PASS” test result is indicated by illumination of
the green LEDs. A “FAIL LOW” test result is indicated
by illumination of the red LEDs. A “FAIL HIGH” test
result is indicated by illumination of the yellow LEDs.
If your ESD test fails, check your wrist strap and
footwear to ensure that they are functioning properly,
being worn correctly and/or need to be replaced.
NOTE: Failures may be caused by dry skin or minimal sweat
layer. For wrist straps, try using an approved dissipative
hand lotion such as
Menda Reztore™ ESD Hand Lotion
to your wrist prior to use. Footwear test results can be
improved by taking a short walk to build a sweat layer for
better conductivity.
The Combo Tester X3 may also be used to test smocks or
garments that feature a grounding mechanism for operators
using a coil cord connection.
Figure 9. Bridging the test switch’s contacts to initiate
the test
Calibration
The Combo Tester X3 is calibrated to standards traceable
to NIST. Frequency of recalibratrion should be based on
the critical nature of those ESD sensitive items handled
and the risk of failure for the ESD protective equipment and
materials. In general, we recommend that calibration be
performed annually.
The accuracy of the Combo Tester X3 is specified as:
• ±10% for < 1 Megohm range
• ±10% for 1 Megohm and higher resistance ranges
• ±20% for 1 Gigohm Range
A periodic check (once every 6 to 12 months) using a
precision resistance box should be performed to verify proper
operation.
The EMIT
50424
Limit Comparator is available for the
convenient period testing of the Combo Tester X3.
The Limit Comparator allows the customer to perform NIST
traceable calibration on the Combo Tester X3. The Limit
Comparator can be used on the floor shop within a few
minutes virtually eliminating downtime, verifiying that the
Combo Tester X3 is operating within tolerances.
See
TB-6581
for more information.
Using the
19276
Combo Tester X3
Using the
19277
Combo Tester X3 with Stand
